Take-up controlling mechanism for looms



Feb. 16, 1932'. I JACKSON 1,845,022

TAKE-UP CONTROLLING MECHANISM FOR LOOMS Filed Dec. 12, 1930 5 Sheets-Sheet 1 Fig. 1.

lnvenToT: Uoseph BdacKson A AITys.

Feb. 16, 1932. J, JIIACKSON 1,845,022

TAKE-UP CONTROLLING MECHANISM FOR LOOMS Filed Dec. 12. 1930 5 Sheets-Sheet 2 L/Q/L Feb. 16, 1932. J. B. JACKSON 1,845,022

TAKE-UP CONTROLLING MECHANISM FOR LOOMS Filed Dec. 12, 1950 3 Sheets-Sheet 3 doseph BdqcKson b %W WJAW An a Silks \nvanTor.

Patented Feb. 16, 1932 nmreo STATES" PATENT orr cs JOSEPH B. JACKSON, 0F MILFORD, MASSACHUSETTS, ASSIGNOR TO DRAPER GORPORA TION, OF'I-IOPEDALE, IMASSACHUSETTS, A CORPORATION OF MAINE" TAKE-U]? CONTROLLING MECHANISM FOR LOOMS Application filed December 12, 1930. Serial No. 501,845.

This invention relates to the mechanism provided in a loom for taking up the cloth as it is woven and the mechanism for stopping the loom when the filling is absent as the result of breakage or failure during the laying of a pick.

The object of the invention is to provide a mechanism which shall insure the accurate, even and regular taking up of the cloth at each pick and in which, if the filling is absent on any pick and the loom is stopped, it will not be necessary to turn over'the loom to match the pick, thus preventing the 0c- M currence of a starting mark or othersimilar defect in the cloth being woven.

The object of the invention is further to provide a take-up mechanism driven by a ratchet wheel advanced one tooth for each pick combined with mechanism acting when the filling is absent, on any pickrto stop the loom and release the feed pawl from the, ratchet wheel before the detent pawl has en-,

gageda new tooth so that the detent paw-l will re-engage the tooth released by it at the e start of the feeding movement and thus enable the pick to be matched and the loom started without having to readjust the pick wheel, change the shed ordo anything more I than swing the lay back, remove the broken pick and insert a fresh pick.

The object of the invention is further to. provide accurate means for ad usting and controlling the operation of the take-up mechanism to secure the desired results.

These and other objects and features of the invention will appear more fully from the accompanying description and drawings and Will be particularly pointed out in the claims. p

Since the general construction and operation of loom take-up mechanisms and varie ous mechanisms for stopping the loom upon the occurrence of filling failure are wellknown and familiar to those skilled in the art, it is only necessary here to illustrate and describe. a simple and pmferred form of certain features of the construction of a loom in order to disclose a preferred embodiment off the present invention.

'sence of filling at each pick.

Inthe drawings:

of a loom embodying a preferred form of the present invention.

Fig. 2 is a front elevation of the construction shown in Fig. 1.

Fig. 3 is a detail of a portion of the con struction shown in Fig. 1 with the parts in stopping position. I

Fig. 4c is a diagrammatic view illustrating the main features of the loom construction involved in the stopping of the loom.

Fig. 5 is a detail partially in cross section showing an adjustable connection between the controller and transmitter lever.

Fig. 6 is an end view of the adjustable stud shown in Fig. 5.

The general construction of the loom may be of any suitable type comprising side frames such as 1 connected by the breast'bearn 2, cross girts 3 andlthe usual shafts including the lay rocker shaft 4.

The mechanism for stopping and starting the loom may also be of any suitable type and is herein for convenience shown as of the general type disclosed in the patent to Northrop, No. 1,676,913, granted July 10, 1928. Since in this invention the loom is to be stopped when the filling is absent upon any pick, the control of the stopping mechanism when the pick is. absent must be of a type which will act on any pick. A. center fork stopping mechanism is peculiarly desirable for this purpose becauseitrequires but a single feeler and, being located at the center of the loom, indicates presence or ab- Any suitable type of center fork mechanism may be em ployed for this purpose,.although it will be understood that other types of mechanism may be employed provided'they are of a. character to indicate filling absence at each pick. I I

In the construction illustrated, as shown diagrammatically in Fig. 4, the main shaft 5 of the loom is provided with a suitable brake 6 anda suitable clutch 7 so arranged that by opening the clutch and setting the brake, the loom may be stopped, and by re leasing the brake and closing the clutch, the

loom may be started. Two shafts are mounted transversely at the front of the loom. One of these shafts known. as the rolling rod 8, see also Figs. 1 and 2, is provided at each end with an upstanding handle 9. This shaft, through a suitable connection 10, acts when rotated counterclockwise, viewing Fig. 1, to set the brake, and, when rotated clockwise, to release the brake. The other shaft 11, also Figs. 1, 2 and 3, is provided at each end with an upstanding shipper handle 12 and connected through suitable connections 13 to the clutch, so arranged that when this shaft is rotated counterclockwise, viewing Figs. 1 and 3, the clutch 7 will be opened or unlocked, and when it is rotated clock wise, the clutch will be closed or locked. In this type of mechanism the rolling rod or shaft 8 connected to the brake is rotated either by the usual protector mechanism or by the center fork mechanism when the loom is to be stopped and is connected as by aconnection 14 to the shaft 11 controlling the clutch so as coincidentally to rotate the shaft 11 and the arrangement is such that the brake is applied and the clutch released coincidentally.

The protector mechanism may be of any suitable type including, for example, a protector rod 15 mounted on the lay and carrying the forwardly projecting daggers 16. \Vhen the shuttle fails to box properly, these daggers engage the usual frogs 17 and 18, one of which, as 18, is thereupon moved as the lay 19 heats up to rotate the rolling rod 8 and coincidentally the shaft 11 to stop the loom.

The center fork mechanism may also be of any suitable type and is indicated as includ- 0 ing a shaft 20 mounted on the lay, a filling fork 21 and a dagger If the filling is absent, the filling fork acts to cause the dager 22 to be positioned in the path of a unter 23 on the rolling rod 8 so that as the lay heats up, the rolling rod is rotated and coincidentally therewith the shaft 11 so as to stop the loom.

The cloth 24 is shown as passing over the breast beam, thence around a suitable idler 25, thence back and around the main takeup or sand roll 26, thence up and over the idler 27, thence past the idler 28 to the cloth roll 29 upon which it is wound up.

The take-up mechanism is operated by a ratchet wheel 30 secured to a shaft 31 journalled in the bracket 32 mounted on the side frame 1. At its inner end the shaft 31 carries a pinion 33 meshing with a gear 34 journalled on the stub shaft and carrying a pinion 36 meshing with a gear 37 on the shaft 38 of the main take-up roll 26. In order that great accuracy of movement of the take-up mechanism may be secured, the gears and pinions 33, 34, 36, and 37 are shown as of the helical cut type which insure a steady, uniform and accurate movement.

The operation of the ratchet wheel 30 which drives the take-up mechanism is secured by a feed pawl. and detent pawl. The feed pawl 39 is pivotally mounted at 40 on an arm 41 extending upward from a lever 42 pivoted on the shaft 31. The pawl 39 is normally held in engagement with the ratchet wheel by the spring 43. The lay rocker shaftis provided with a forwardly projecting arm 44 slotted at 45 and the lever 42 is longitudinally slotted at 46. A connecting rod 47, the length of which is adjustable, as by the turnbuckle 48, has its lower end adj ustably and pivotally mounted at 49 in the slot 45 and its upper end adjustably and pivotally mounted at 50 in the slot 46. It will thus be seen that by means of these various ad justments the rocking movement of the lever 42 and consequently the feeding movement of the pawl 41 carried thereby may be adjusted with extreme accuracy.

The detent pawl 51 is pivotally mounted on a stud 52 carried by the bracket 53 secured to the side frame. The spring 54 acts normally to maintain the detent pawl in engagement with the ratchet wheel.

The take-up mechanism is so constructed and adjusted that a movement for the length of one tooth of the ratchet wheel 30 will advance the take-up mechanism to the exact extent required for the weaving of one pick. This means, of course, that the feed pawl at each feeding movement will be given a movement somewhat greater than the length of one tooth of the ratchet wheel, but substantially less than the length of two teeth in order to enable the detent to engage a new tooth each time the feed pawl advances the ratchet wheel the length of one tooth. The mecha' nism is also so timed and adjusted that the detent pawl thus engages a new tooth before the lay reaches front center so that the advance of the take-up mechanism at each pick during the normal operation of the loom is always completed before the lay reaches front center.

In the present invention the mechanism which acts to stop the loom when the fillin is absent on any pick is so arranged as to e ect the stopping of the loom and the release of the feed pawl from the ratchet wheel before the detent pawl has engaged a new tooth. Consequently the loom is stopped before the feed of the take-up for the pick in which the filling is absent has been completed and before the lay has reached front center. And as the feed pawl is withdrawn from the ratchet wheel before the detent pawl has engaged a new tooth, the ratchet wheel reverses its movement slightly and the detent pawl reengages the tooth which was released by it at the start of this particular feeding movement. Consequently when the loom is stopped, all that the operator has to do is to push the lay backward sufiiciently to get at the broken pick, remove the end, and insert the new pick. Then the loom is started in the usual manner and the operation continues just as if nothing had happened. There has been no change in the relation of the take-up mechanism to the other features of the loom and theweaving operation continues without the possibility of any starting mark or other defect being occasioned to the cloth as the result of the stopping and starting of the loom. This is an extremely important feature, particularly in the weaving of such fabrics as rayon and silk.

In the construction illustrated for securing these results, the feed pawl 39 has secured thereto and projecting forwardly therefrom an arm 55. A transmitter lever 56 is fulcrumed on the stud 52 with its lower end 57 overlying the end of the arm 55 and with its upper end extending rearward and backward and provided with a cam-shaped slot 58. An eccentric stud 59 is adjustably mounted in the shipper handle or controller 12 and engages the slot 58. The details of the construction of the eccentric stud 59 are shown in Figs. and 6. The. stud 59 extends lt'will thus be seen that an extremely accurate adjustment is here provided so that when the controller 12 is moved to stopping position, the transmitter lever 56 may be moved to engage the arm 55 and throw the feeding pawl 39 out of engagement with the ratchet wheel at exactly the time required.

The operation of the mechanism thus described in accordance with the principles of the invention will now be clear. If the filling fails, as by breakage on any pick, the center fork 21 acts to set the dagger 22 and as the lay beats up, the shafts 8 and 11 are rocked to stop the loom. .But the timing is such that the loom stops before the lay has reached front center and consequently before the broken pick has been beaten in. As the shaft 11 rocks, it acts through the transmitter lever 56 and the arm to throw the feeding pawl out of engagement with the ratchet wheel. But, as pointed out, this release of the feed pawl also takes place before the feed pawl has advanced the ratchet wheel surliciently to enable the detent pawl to engage anew tooth. Consequently, as the loom stops and the feed pawl is released from the ratchet wheel, the detent pawl re-engages the tooth. with which it was in engagement when the feeding movement of the feed pawl for this pick started. The operator then simply pushes back the lay, removes the old pick, in-

sefts a new pick, and swings the shipper or controller'lever 12 cc starting position. This reverses the movement of the transmitter lever56 andallow's the feed pawl to re-engage incomplete by the stopping of the loom.

Having thus described the invention, what isicla'i'medas new, and desired to be secured by Letters Patent, is:

1. A =loom comp'r1s1'nga lay and means for swinging it, take-up mechanism, a ratchet wheel for driving the take-up mechanism in which a movement for the length of one tooth advances the take-up mechanism to the extent required for weaving one pick, a feed pawl, means for operating the feed pawl to advance the ratchet wheel one tooth for each pick, a detent pawl held in yielding engagement with the ratchet wheel, a movable controller, mechanism acting when the filling is absent on any pick coincidentally to move the controller and to stop the loom before the detent pawl has engaged a new tooth, an adjustable eccentric stud on the controller, and a lever having a slot in one arm riding on said studand having its other arm adjacent the feed pawl, the said lever acting upon the movement of the controller to stopping position to engage and release the feed pawl and thus permit the detent pawl to reengage the tooth released by it at the start of the feeding movement.

2. Take-.up'controlling mechanism for a loom comprising a pivotally mounted shipper handle, a ratchet wheel for controlling the rotation of the take-up, a pivotally mounted pawl cooperating with the ratchet wheel, an arm rigid with and projecting from the pawl, and a transmitter lever having one arm overlying the pawl arm and the other arm engaging the shipper handle, the said elements acting, when the shipper handle is swung to stop the loom, simultaneously to move the pawlfrom cooperation with the ratchet wheel. v

3. Take-up controlling mechanism having the construction defined in claim 2, in which thecooperating engagement of the transmitter lever and the shipper handle is effected by a cam shaped slot in the transmitter lever and a rotarily adjustable eccentric stud 0111 the shipper handle extending into said s ot.

4. A loom comprising a lay and means for swinging it, take-up mechanism, a ratchet wheel for driving the take-up mechanism in which a movement for the length of one tooth advances the take-up mechanism to the extent required for weaving one pick, a feed pawl and a detent pawl for the ratchet wheel, a lever fulcrumed on the axisof the ratchet wheel and carrying the feed pawl, an arm moving in time with the lay, a link connecting the arm and lever and transmitting movement from the arm to the lever to advance the ratchet wheel one tooth and to permit the detent pawl to engage a new tooth before the lay reaches front center, and mechanism acting when the filling is absent on any pick to stop the loom and release the feed pawl from the ratchet wheel before the detent pawl has engaged a new tooth.

In testimony whereof, I have signed my name to this specification.

JOSEPH B. JACKSON. 

